192 pp with 48 illus, maps and battle plans "In the last decade of the fourth century AD one emperor-Theodosius-still ruled over an Empire larger than that of the great Augustus, and commanded a massive army. Less than eighty years later, both Empire and army in the West had been wiped out. How did this happen? Barbarian invasions certainly played their part, but the fundamental cause, Professor Ferrill shows, lay within the Roman army itself."